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Titolo:
ENKEPHALIN-LIKE IMMUNOREACTIVITY IN THE CHICK BRAIN-STEM - POSSIBLE RELATION TO THE COCHLEAR EFFERENT SYSTEM
Autore:
CODE RA; CARR CE;
Indirizzi:
TEXAS WOMANS UNIV,DEPT BIOL DENTON TX 76204 UNIV MARYLAND,DEPT ZOOL COLLEGE PK MD 20742
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 87, anno: 1995,
pagine: 69 - 83
SICI:
0378-5955(1995)87:1-2<69:EIITCB>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PREPROENKEPHALIN MESSENGER-RNA; SUPERIOR OLIVARY COMPLEX; GUINEA-PIG; OLIVOCOCHLEAR NEURONS; CHOLINE-ACETYLTRANSFERASE; GALLUS-DOMESTICUS; MET-ENKEPHALIN; RAT; LOCALIZATION; PROJECTIONS;
Keywords:
SUPERIOR OLIVARY NUCLEUS; LATERAL LEMNISCAL NUCLEI; COCHLEAR EFFERENT NEURON; CHAT-IMMUNOREACTIVITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
52
Recensione:
Indirizzi per estratti:
Citazione:
R.A. Code e C.E. Carr, "ENKEPHALIN-LIKE IMMUNOREACTIVITY IN THE CHICK BRAIN-STEM - POSSIBLE RELATION TO THE COCHLEAR EFFERENT SYSTEM", Hearing research, 87(1-2), 1995, pp. 69-83

Abstract

Mammalian lateral olivocochlear (LOG) neurons that are immunoreactivefor choline acetyltransferase (ChAT) are also immunoreactive for enkephalin (Enk). To determine whether cochlear efferent neurons in birds might also contain Enk-like immunoreactivity (Enk-LI), we studied the auditory brainstem of the domestic chicken using antisera to ChAT, leucine-enkephalin (L-Enk) and methionine-enkephalin (M-Enk). Enk-LI terminals are found around, but not within, the superior olivary nucleus (SO) and the nucleus of the lateral lemniscus, pars intermedia (LLi). Amoderate concentration of Enk-LI terminals is found ventromedial to the ventral facial nucleus (VIIv) where the ventrolateral group of ChAT-I cochlear efferent neurons is located. After colchicine injections into the lateral ventricle, a population of intensely stained Enk-LI perikarya was found in the nucleus of the lateral lemniscus, pars ventralis (LLv) with scattered cells in the LLi and the nucleus subceruleus ventralis (SCv). The distribution of Enk-LI and ChAT-I somata, however, never overlapped, even in adjacent sections. Thus, in the chick, Enk-LI perikarya are not distributed in areas where cochlear efferent neurons are found. Instead, a dense concentration of Enk-I terminals can be found in areas containing ChAT-I cochlear efferent neurons. The source of these enkephalinergic terminals may be a population of Enk-LI cells in the LLv.

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Documento generato il 20/09/20 alle ore 07:51:15